Rotary furnace.



E. S. DAVIS.

ROTARY FURNACE.

APPLIGATION FILED SEPT.29.1909

Patented Dec. 5, 1911.

2 SHEETS-SHEET 1 @9431; 1 woos o 1 (Zn 1m WW B. S. DAVIS.

ROTARY V'URNACE APPLICATION rum) SEPT.29,1909

1,010,728. Patented Dec. 5, 1911.

2 SHIIETSSHEET 2.

UNITED STATES PATENT OFFICE.

EDWARD S. DAVIS, 01' JERSEY (lITY, NEW JERSEY, ASSIGNOR TO ROCKWELL FURNACE COMPANY, A CORPORATION OF NEW YORK.

sonny ruanaon.

To all whom it may concern:

Be it lmown that I EDWARD S. Davis, a citizen of the Unite States, and a resl dent of J er'sey. Cil tzy, in the county; of Hud-- son and State of ew Jersey, have invented certain new and useful Improvements Rotary Furnaces, of which 1e following is a specification.

My invention relates to improvements in rotary .furnaces, and articularly to fur naoesof this type whic are fired by liquid or gaseous fuel. It'is essential to the sunce'ssful o ation of a, furnace of this sort that the lanks or articleswhich are being annealed, temperedor heat treated, all be heated to the same-uniform degree and for this reason all the blanks shouldbe fed through the furnace at the same even rate, of travel. Heretofore it has been customa to provide furnaces of this character wit a helical lining which acted, as the furnace 86 handl than others because i not adapted for handlingarough or 'revolved, in the capacity of a'screw-thread to advance the artic es under treatment from the inlet to the discharge end of the furnace. This helical lining serves its purpose so long as the articles or blanks are smooth and er in shape. But. this sort of is ar blanks forwhen the b ulrs are roug or lar in shape, there is a tendency for them-to become caught and stick in the screw-thread grooxesof the lining andthis results in an uneven heatin of the blanks.

It is one of the ob'ects-o m 6 these ar sha articles and to provide for their even passage through the furnace, thereby assuring a uniform heating of all the articles.

' Another object of my invention is regulate the heating of the articles to any desired Wallof the furnace which was opened at regular as the rotated. This intermittent discharge is objectionable,' in that, some of the articles arelheated more in each discharge the first articles to arrive at the discharge point receive more heat than the later ones to arrive, and also, in that, the operation of the furnace. is discontinuous.

specification of hatter: Patent. a anoauoii fled September as, 1909. Serial No. 520,100.

invention to Patented Dec. 5, 1911.

lining permits articles of any irregular shape, such as bolts and the like, to he handled, and the feeding of the blanks is accomplished by tilting or inclining the furn'aee body; The inc med position of the furnace, together with the revoluble move, 7

ment, causes the blanks to-be fed forward in a spiral sort-of movement. The speed of "travel through the furnace, and hence the regulated by adjust- 7 degree of heat, maybe ing the inclination of the urna'ce body.

Another feature of the invention resides in the 'rovision of a relativel stationary head w ich is located at one an of the fur name and has a bore or o ing corresponding to the o ening in the rnaoc body. This stationary cad carries the outlet from the furnace, preferabl in the forrnof a discharge chute, so atthe articla may pursue an.unobstructed path from the revolving furnace body into the stationa head and out through the discharge outlet erein.

Various other minor features of the invention will appear as the specification pro- A preferred embodiment of'the invention isillustrated in the accompanying drawin but it will be understoodthat various mo ifications and changes may be made without.

departing from the spirit and scope of the invention.

In the drawings: Figure 1 is a sideelevation, with parts broken away, of the furnaee in its normal tilted position. Fig. 2 is an end view of the furnace, in the horizontal non-tilted position.

Like reference characters denote like parts throughout the several views. 1

The furnace body consists preferably of a cylindrical casing or shell 1, haying a plain unobstructed lining 2. This lining is preferably of cylindrical shape to provide a continuous assage or opening from end to end.

of the mace. This opening of furnace ch'amberneed not, for allpu-rposes, however,

furnace is rotate ill monlin a wormwhecl 16 on the shaft 17,-nnd

.as shown. or as a matter of fact, this;drivbe made c lindrical' as it could be made to taper in diamete irom end to end. The

3 preferably by mcahs or the rollers 3,. upon which it is supported and thcsesnpporting rollers may be drivenbl suitable 'gcarin such"'as the bovel. gear pinion 5, sproc (et 6, chain '7, and sprocket pinion 8. V The furnace as a whole is carried by a support, preferably such as the frame 9, which is'pivoted at the poin 10, upon-a foundation or support 11" so as to be capable of a tiltin movement. I ho means for tilting; or inc ining' the furnace-may consist of any suitable mechanism-but it refer-ably conisis of a handwhcel- 12, whic 1, by means of lmvol'gem's 13-14 imparts a rotary movement ton-worm not shown) in has withgrovl.ll;'i\'llifih worm in'tnrn imparts move- Zllflfl onsaid shaft is a spur pinion 18, meshing witha dependent rack 19, on the suppoflin'gframew-It'will be obvious that'gby turning-the linnliwhrehzthe inclination; of

the furnace maybe adjusted at will. Inorrler-that the furnace may bo rotated regardloss of-its liltedpositiomthe driving connectinns'foiurotating the same preferably have a center-mi movement corresponding to the piv'otal connection between =tho foundation and. supporting frame. For this reason the sprocket-pinion 8, or other drivinmcon'neotion,i.as, the case maybe, preferably moves onmmentercorresponding to the pivot 10,

inkmembet' may be journalcd direction the extended end of the pivot. Motion is ,imparted to-tbe driving member by means of :1 hell on the policy 21-, or other snchsuitahle A feed hopper 22 is located at one end (the illJl'llJ" end) of thc .turriace and this'hopper may. if desired, becarried by and 'rotate with tho fnrnaceihntfor. handling irregular material l prefer to employ a. stationary hnppm'. such as shown, which'is supported on the end of the framc bymeansj ofa bracket 23. A flangorlrim 24, is nrrfcrably provided to o erlap the mouth of the hopper. to 'pmrcnt any less of heat. and, if desired. the hopper may be provided with a charging door (not shown). Lnhaled at the on its end of the furnace. (whichis n rmal v tho ltHYUT end) there is pro .ided 's relativclv stationary head 25. andt e, interionof this head; has u compartment :ijr} openi g 26; which forms I. coili'r'u'iatimi of the fl'lltlfifl. chamber.- lhc bu mo -.21. ,is carried ,bvitho head and discharges}: qthe {or-nice .chhn'z.

'The fuel tieeding conigectlonsfsre pref- M 1) o nted at a 'po at i'a line withfthe V rgin] st} port pf fho fir ace that the mrner'm giopcrata we of the tilted. pqertnqmhtbs furnacsfbut .13 this is. i coma .2 1 one. she se n ammonia 1' I -H I l I 1 inlet .through t c clisch charging the cooled articles outlet from the furnace is also preferably carriedby the head and-.inthepresent inlstancb l8 cohsidts'of 6 discharge chute 28.

The mouth of the dischar 'c 'chut' is'in direct communication with t a chamber in the head, so that in this way s free unobstructed passe a forthc blsnks is'frovided from the op or at one and f the furnace, out urge chute at the opposite end'ofthe furnace. This discharge chute may be secured to the frame and it will then serve conveniently as s means for supporting the head.

As the articles pass out of thordischsrge chute they are received in ii suitable receptacle and this race taclo ma provide a bar'- dening or cooling ath for t 0 articles. For this reason the'reoeptaclo would preferably be in the form of a. tank 29, into which the lower'end oi the chute dips. This tank would be supplied with a cooling liquid by suitable pipe connections 30. Also the level of the liquid inthe tank would bcregulated to rovide a seal for the lower end of the chute. here would. also preferabl be providcdan inclined conveyor 31, for e evating and disfrom the tank.

T0 or articles from prevent any of the blanks falling to the extreme bottom of the ,tank, and o it of reach can pockets in thc'cdnveyor, there-would preferably be rovided an inc ined guide 82, suppo'rted mm the wall of thetank at the mat 33, and preferably hinged there so. hat its lower end .Wlll remain in contact with the wall of each succeeding pocket'pfthe conveyor. I also provide means for taking up the thrust of the furnscobody when'the same'occ'upies an inclined position. This means would referably consist ofone or more thrust r0] ers 34, journaledon brackets 35, and ads ted to be engaged by an outstanding annu er flange 36 on the furnace body.

What is claimed is: 1 A-furnsco' comprising: asupport, a tilt able frame mounted thereon, means for adjusting. the Q inclination o! said frame, an open-ended cylindrical furnace body journaled to rotatefon-the frame said body having a; cylindrical furnace hopper-"carried by the up f me to cooperate was oh hall; aclosure totheopen upper end of the urnace body,'a stationary head mounted V on the lower end my head having in terior furnace lining to pro ides'stnnomry 0on6; slnmbermhic chamber corifprtnsyto anwcpnstitutes 's"'s't fa tipnary lcontinpatiori of the rota -furnace chambero receive froxnthe turna'ce'chsmbor n d scbsmute. lfiadigqidofyfnwirdfmmfthe' outlet '7 ber,

end of the, form substanimis an inlet of the frame, said stationQlzo ed by the stationary head and discharging Signed at New York in the county of through the burner opening therein into the New York and State of New York this 27th outlet chamber, fuel feeding connections to day of September A. D. 1909.

i the burner, and driving-connections for ro- EDWARD S. DAVIS.

tating the furnace body, having a center of Witnesses: movement corresponding to the center of W. S. QUIGLEY, pivotal support of the tiltable frame. A. E. HoovEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

